It was such a hammer blow that it took McLaren 21 years to produce a supercar capable of coming close to the F1.

In May 1994 we took the fifth McLaren prototype, codenamed XP5, to two proving grounds – Millbrook and Bruntingthorpe – to attempt to generate a full set of performance figures. That same car was driven, four years later, by Andy Wallace at Ehra-Lessien in Germany to record a world record-breaking 243mph.